RIGHT LOOK. RIGHT STRENGTH. RIGHT SIZE. Verti-Block™ retaining wall blocks were created with landscaping in mind -- we've made it easy to transport and install, there's no need for heavy machines like a telehandler or crane. The male and female connection eliminates placement error, ensuring strength and an exact installation every time. Also, the engineered hollow cavities allow for more flexibility with drainage and less concrete required for each block which will save time and money.